Standing valve extractor



Jan. 9, 1951 T. J. BoADwAY 2,537,810

STANDING VALVE EXTRACTOR Filed Aug. 50, 1945,

A'ITQRNEYS Patented Jan, 9, 1.951

UNTEB STATES PATENT YFFICE y'=s'1A`NI)*n\Io VALVE EXTRACTOR Thaddeus J. Boadway, Pampa, Tex. "Ailitin'Al'gusf 30, 1945i, Serial-N0. 613,515

1 Claim.

The invention 'relates-to an extractor` for effecting the removal and replacement' of the 'standing 'valves offpumps-fgenerally, and more especially the standing'fvalvesof' oil pumps; its primary object'being'to .provide one that is ocin- Ipeuratively simple vand inexpensive `vinconstru'ctiori and design and, in the use of which, a standing valve may be placed' within a pump barrel or casingA witheaseand dispatch;L or v'removed there- -frorn,-in'order to Amaintain theropera-ting eiliciency-o'i the pufnp; theremoval and vreplacement 'being re'adilv a'cc'niplishedwithoutresort t'o the removal of the barrel or casing.

-Another'object f the 'invention 'has todo with 'the'p-rovisionoff such anextractor'and which is adapted tobedetachabiy engagedwith the fc'ag'e 'or case of astandingvalve ff'or the vernplacement ofthe same on the standing valve'bo'dy, and to' be -interlocked 1 therewith inv 'effecting i its removal vfrom the latterand itswith'drawal from the barrel of the pump.

A further object of the invention lies rin the provision yof the eitractoras hereinb'efore characterized and whichhas the form 'ofa cage-like bodyfadapted for attachment to thebottorno the traveling valve of a"`pum'p; anda grappling member 'carriedby the body 2and Aadjustable relativelyv th"ereto,'to-1-and fronione or the other of its two positionsof luse; fthe grappling'ine'inb'er being adapted-tobe detachably 'engaged with the standing valvevcage, \in effecting" fth'e emplacement of the same 1on thestandingvalve body, when-in'oneoffit-spositions-df use; and to be inl terlockedwith the-standing: valve cagefi'n` ei-l fecting the frernoval thereof 'from the standing valve body' and -itsv-wi'thdrawalfrom the `rpump barrel,-whenfdisposed in; the vother position of use.

With these and other-objects'inf-view the invention-consists infthewfeatures of construction, combination and arrangement of parts as will be hereinafter rnore fully des'cibd, i illustrated in the accompanying drawing, which showsthe preieri-ed embodiment ofthe invention; and pointed out in the claim hereunto appended.

In the accompanying drawing:

Fig-ure l is a vertical "longitudinal `Asentirmi through -the standing valve'lv-and-"working"barrel with the extractor assemblyJconstruote'dfiinaocordance with the invention in association.

Figure 2 is a view similar to Figure l showing interlocked engagement thereof.

Figure 3 is a fragmentary sectional view taken on the line 3-3 of Figure 2 looking in the direction of the arrows.

Figure 4 is asectional View'takenon the line lt-fi of Figure 2 'lbkingin thedirec'tion ofthe arrows. i

Figure 5 is a -sectional view taken on the line 5 5 of Figure Z'lookin'ginthe direction'of-fthe arrows.

Similar reference "characters indicate .corresponding parts'th'r'ou'ghout the several 'viewsin thedrawing.

Referring 'to the -drawings' in detail,- Af designates the top end 'offan oil w'ell'casingfand B a pump barrel ino'unt'ed'thereon. A standing valve body lil, provided witha' Vplurality of superirnf posed packing ringsi I I Heldin place'onits lower end portion' by a jam nut l2, is positioned in the lowerend of the barrel B. Thelstanding Valve body lil, abovetheipackingrings' I'I,'is"tape'red for a portion of itsflen'gthfas at I1, and'terrninates in a cylindrical top end portion Ila.

Detachably seatedon this'redu'ced end' portion of the standing valve 'body' Iii,4 isa cylindrical cage-like bodyi'housing'a valve elementflfl, orr'eie'rabl'yA in the forrnof.aba'll;7 the' lov'ver end of the cage i3 beingfopen and 'screw threaded 'onto an annular member'lufconnect'ing the' upper ends of a set o'f'"equidistantlyv spaced 'jaws I6 which engage about the tap'eredand clvlindri'cal portions of the vstaidingvalve body; Fitted within the lower'e'nd o'f the'cage I3 and the 'upper side of the annlarmemb'er Ita, is a' 'seatfv'l for the valve'elen'ent I4; theseat' 'resting on a flange I'Eib, encircling' theinner side` of the annular member; and thus centering the valve opening 'with respect to the bore` extending upwardly through the standingvalveibody IG. The lower side of the flange 16h is grooved to engage over the top'edge of the cylindrical part' I'Ia," ofthe standing Valvebodywhich edge' is preferably beveled, as at 2Q, to support a gasket 2 l', in sealing 'contact with the complementary angle of said groote. The tapered partv I'I, o'f the standing Valve' body, is'p'rovided with anannularvgroove i 9 `to` seat an expansion' 'ring ljwhich'isadapted toengage in veonriplernental grooves itc, formed in ther inner sides offthe jawsfl'to'r'etain' the valve'cage i3 in; place' during pump operation and to permitoffits disengagement and withdrawal upwardly of vthe v'barrel B, whenfrequired. rlih'eside wallfof the valve'cage' I3 'is vertically slotted, as at I3a, and its top end wall is oentrally apertured to receive a bushing 35, the bore oi the bushing being disposed in line with the valve opening in the seat I5.

For accomplishing the objects and purposes of lh@ A,inVllorl, the .extractor takes the form of a cylindrical body 23, having its upper end open and screw threaded, as at 23a, for attachment to the lower end of the usual traveling valve (not shown), carried at the lower end of the suction rod (not shown) of a pump. The lower end wall 23h, of the body 23, is also centrally apertured for the vertical adjustment therein of a grappling device, which is comprised in a pin 24, having its upper end headed, as at 24a, and its lower end 24h curvingly tapered and projecting downwardly through the said aperture. Fitted within the body 23, and resting on an annular shoulder 23e encircling the inner side wall thereof, is a cage-like body 25, having a top end wall 26a disposed immediately below the internally threaded portion 23a of the body 23, and a bottom wall 25h disposed in spaced relation with respect to the bottom wall 23h. The wall 25h is centrally apertured for the passage of the pin 24 therethrough, with its headed end 24a housed between the upper and lower walls 25a and 25h, of the body 25, and its lower end 24h, as before stated, depending through the aperture in the lower end wall 23h, of the body 23; the latter end of the pin having an annular groove 33 at the base of the taper thereof to be engaged by an expansion ring 32, carried in an annular groove formed in the bore of the bushing 35, to detachably connect the valve cage i3 with the extractor body 23, when it is to be lowered within the barrel B to seat on the standing valve body It.

Pivotally mounted in the opposite ends of a slot formed diametrically through the pin 24, immediately below the head 24a, is a pair of latches 28, which are retractably held in projected positions, outwardly of the slot ends, by a spring element 30; and likewisev mounted in a second such slot in the pin, at a point substantially midway between the upper slot and the tapered end 24h, is a second pair of Vlatches 29, which are also retractably held in projected positions, outwardly of the slot ends, by a spring element 313. In the use of the extractor, as thus constructed and arranged, it is to be screw threaded onto the lower end of the traveling valve, or of the suction rod, for the purpose of placing a valve cage I3 in position on the upper end of the standing valve body I0, subsequent te the removal of the same for repair or renewal; it being understood that the valve cage was emplaced on the standing valve body when the parts of the pump were assembled, at the time of the installation thereof.

To remove the valve cage I3 from the standing valve body Ill, the pin 24 is positioned relatively to the body 25 with the upper set of latches 28 engaged beneath the lower end wall 25h and the lower set 29 beneath the lower end wall 23h, of the cuter body 23, substantially as shown in Figure 2 of the drawings. Now, on the down-stroke of the suction rod, the tapered end 24h, of the pin 24, passes through the bore of the bushing 35, carried in thetop end of the valve cage I3, as does the groove 33 and the lower set of latches 29 also, the groove and latches snapping past the expansion ring 32, in the bore of the bushing, to that end. As the latches 29 clear the bore, they are projected outwardly beneath the lower side of the bushing 35, by the expansion action of the spring element 3S associated therewith, so that the extractor and the valve cage I3 are positively coupled together and the latter therefore will be lifted from the standing valve body Ill on the up-stroke of the suction rod, the attaching jaws i6, of the valve cage, snapping free from the expansion ring I8.

To replace the valve cage I3 on the standing valve body I0, the pin 24 is positioned relatively to its carrier body 25, with the upper set of latches 28 above the bottom wall 25h and the lower set 29 beneath that wall and between the same and the lower end wall 23h, of the outer body 23. With the pin 24 in this position, the tapered end 2419 is inserted into the bore of the bushing 35, in the upper end of the valve cage I3, until the groove 33 is engaged by the expansion ring 32, the retaining effort of which being sumcient to support the valve cage I3 on the down-stroke of the suction rod to seat the latter on the upper end of the standing valve body I0. When seated., the valve cage I3 is retained in place by the expansion ring IB suiciently to permit of the freeing of the pin 24 from the holding effort of the expansion ring 32 and the withdrawal of the extractor upwardly of the barrel B, on the up-stroke of the suction rod. Access is to be had to the latch pair 28 by inserting the lingers inwardly through slotted openings 23e formed in the side wall of the body 23 for the adjustment of the pin 24 in the stated manner, the openings being shown in Figure 4, and, in this connection, it is to be understood that the body 25 is removable from within the body 23, when the latter is separated from the traveling valve.

Having thus fully described a preferred embodiment of my invention, it is to be understood that the words which I have used are words of description rather than of limitation, and that changes within the purview of the appended claim may be made, without departing from the true scope and spirit of my invention in its broader aspects.

What is claimed is:

In combination, a valve body, a cage detachably connected to said valve body, an extractor for moving said cage into and out of engagement with said valve body, a bushing connected to the top of said cage, said extractor including a hollow body, a grappling pin reciprocably carried by said holow body and having a lower tapered end mounted for movement into and out of said bushing, coacting means on said grappling pin and bushing for selectively maintaining said pin in said bushing, horizontally disposed spaced parallel walls arranged in said extractor, latches pivotally connected to said grappling pin and mounted for movement through said walls into and out of selective engagement with said bushing, and springs for normally urging said latches out of said grappling pin.

THADDEUS J. BOADWAY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

